redfish_free_block_locs: free partial arrays
redfish_free_block_locs: free partial arrays

Don't crash if the array of redfish_block_loc structures we are freeing
is only partially initialized.  This makes this function more useful in
error handling code.

Signed-off-by: Colin McCabe <3142ce8a0bdba4a38073365893e6b74f72d9c512@alumni.cmu.edu>

cmccabe/redfish,cmccabe/redfish,cmccabe/redfish,cmccabe/redfish,cmccabe/redfish